Chen Xian, Peng Dengfeng, Wang Feng
Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong.
City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.
Nanomaterials (Basel). 2013 Oct 24;3(4):583-591. doi: 10.3390/nano3040583.
Phase and size of lanthanide-doped nanoparticles are the most important characteristics that dictate optical properties of these nanoparticles and affect their technological applications. Herein, we present a systematic study to examine the effect of alkaline earth doping on the formation of NaYF₄ upconversion nanoparticles. We show that alkaline earth doping has a dual function of tuning particle size of hexagonal phase NaYF₄ nanoparticles and stabilizing cubic phase NaYF₄ nanoparticles depending on composition and concentration of the dopant ions. The study described here represents a facile and general strategy to tuning the properties of NaYF₄ upconversion nanoparticles.
镧系掺杂纳米粒子的相和尺寸是决定这些纳米粒子光学性质并影响其技术应用的最重要特性。在此，我们进行了一项系统研究，以考察碱土金属掺杂对NaYF₄上转换纳米粒子形成的影响。我们表明，根据掺杂离子的组成和浓度，碱土金属掺杂具有调节六方相NaYF₄纳米粒子粒径和稳定立方相NaYF₄纳米粒子的双重功能。这里描述的研究代表了一种调节NaYF₄上转换纳米粒子性质的简便通用策略。
